video has 5 distinct synonyms spread across 3 of its 4 senses. Each sense below keeps its own list, because a synonym belongs to a meaning and not to a word: swapping one sense's substitute into another sense's sentence is how a thesaurus makes writing worse. WordNet records no antonym for it — antonymy is a relation between word forms rather than concepts, so it is deliberately sparse.
Counts are distinct word forms across every sense. A synonym that appears under three senses is counted once here and shown three times below, under each sense it belongs to.
the visible part of a television transmission
“they could still receive the sound but the picture was gone”
a recording of both the visual and audible components (especially one containing a recording of a movie or television program)
(computer science) the appearance of text and graphics on a video display
broadcasting visual images of stationary or moving objects
“she is a star of screen and video”
Synonyms, antonyms and the broader and narrower relations for video come from Princeton University’s WordNet. Full sources and licences.